Tell me how plants spread their seeds. What are these ways related to?

1. Dandelion spreads seeds by wind, and the way dandelion spreads seeds is related to its seeds. The flower head of dandelion has white crown hair on its seeds. Its seeds are very light, and after flowering, they float to new places with the wind to breed new life.

2. Rapeseed is spread by catapult. When the fruit is ripe, its shell will burst suddenly, and at the same time, the seeds will be ejected to achieve the effect of diffusion.

3. Xanthium sibiricum spreads seeds through animals. Xanthium sibiricum has a strange way of sowing seeds. Because its seeds are full of thorns, it is easy to stick to people and animals, thus completing the seed spread.

4. Chestnuts spread seeds by rolling fruits. When the fruits of chestnuts are ripe, chestnuts will fall from the trees and roll to the ground, thus completing the spread of seeds.